Running host programs in isolation inside one-off Docker containers

I am quite bad at remembering how to launch docker to have everything set up correctly. Hence the following - a script that launches any commandline specified in its arguments inside a new docker container. Current directory is mounted inside the container automatically, so the thing you are executing can have its local dependencies satisfied.

I use vanilla Debian Jessie as a run platform there, mostly because this is what most of my servers run.
The script covers setting up SELinux and mounting the directory from which it is run as /mnt inside the container while also having the default non-root user added.